Finding the Fourth Proportional to 16,216.60, 22,377.56 and 9,144.76

Step by Step Solution

1. Step 1: Write the proportion equation
   16,216.60 : 22,377.56 = 9,144.76 : x
2. Step 2: Convert to fraction form
   16,216.60/22,377.56 = 9,144.76/x
3. Step 3: Cross multiply
   16,216.60x = 22,377.56 × 9,144.76
4. Step 4: Simplify right side
   16,216.60x = 204,637,415.59
5. Step 5: Solve for x
   x = 204,637,415.59/16,216.60
6. Step 6: Final answer
   x = 12,619.01